* {
    margin: 0;
    padding: 0;
    /* c3盒子模型 */
    box-sizing: border-box;
}
body {
    margin: 0 auto;
    font-size: 14px;
    color: #000;
    position: relative;
}
::-webkit-scrollbar{/* 滚动条 */
    display: none;
}
.clearfix:after{/*伪元素是行内元素 正常浏览器清除浮动方法*/
    content: "";
    display: block;
    height: 0;
    clear:both;
    visibility: hidden;
}
.clearfix{
    *zoom: 1;/*ie6清除浮动的方式 *号只有IE6-IE7执行，其他浏览器不执行*/
}
img{
    border: none;
}
a {
    cursor: pointer;
    color: #000;
    text-decoration: none;
    outline: none;
}
ul {
    list-style-type: none;
}
/* 去除列表前面的点 */
li {
    list-style: none;
}
em { 
    font-style: normal;
}
.lt {
    float: left;
} 
.rt{
    float: right;
}
div.clear {
    font:0px Arial;
}
.banner {
    margin: 0 auto;
    width: 99vw;
    height: 650px;
}
.banner img {
    width: 100%;
    height: 100%;
}
  /*导航条  */
header {
    background-color: #000;
    height: 50px;
}
  
.nav {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}
.nav li:nth-child(1) a{
    color: bisque;
}
.nav li {
    float: left;
    padding-left: 50px;
    padding-right: 50px;
}

.nav li a {
    color: white;
    font-size: 25px;
    line-height: 50px;
}
/* 鼠标经过变色 */
.nav li a:hover {
    color: bisque;
}
.text h2 {
    text-align: center;
    font-size: 25px;
}
.text h6 {
    text-align: center;
    
}
.text p {
    font-size: 18px;
    padding: 5px 20px;
    text-align: center;
}
.timeline h2 {
    text-align: center;
}
.bg {
    width: 99vw;
}
.bg li {
    width: 33%;
    float: left;
    padding: 5px 10px;
    overflow: hidden;
    transform: scale(0.9);
}
.bg li img {
    width: 100%; 
    transition: 0.5s linear;
}
.bg li img:hover {
    transform: scale(1.2);
}
.title h2 {
    text-align: center;
}
.text1 {
    text-align: center;
    padding: 5px 10px;
}
.butto {
    width: 99vw;
}
.butto li{
    padding: 5px 10px;
    width: 33%;
    float: left;
    overflow: hidden;
    transform: scale(0.9);
}
.butto li img {
    width: 100%;
    transition: 0.5s linear;
}
.butto li img:hover {
    transform: scale(1.2);
}
footer {
    float: right;
    padding-right: 20px;
}